Whooping cough is an acute respiratory infectious disease caused by Bordetella pertussis infection, commonly seen in children. The main symptoms are paroxysmal spasmodic coughing and a crowing inspiratory whoop. The disease has a long course and may be complicated by pneumonia, neurological diseases, and others. The diagnosis of the disease mainly relies on the cultivation of Bordetella pertussis, detection of Bordetella pertussis DNA, and testing for pertussis toxin antibodies. In this disease, the routine blood test will also show a significant increase in the white blood cell count, lymphocyte count, and white blood cell differential.